CN102981670A - mobile position coordinate generating method - Google Patents

Abstract

The invention discloses a method for generating moving position coordinates of a human-machine interface input control device that continuously generates multiple position coordinates according to the movement of an object. The method includes the following steps: reading and storing the position coordinates; when the number of stored position coordinates reaches a preset value, calculating the position coordinates to obtain the moving position coordinates; moving according to the object The speed changes to change the size of the preset value.

Description

Method for generating mobile position coordinates

technical field

The invention relates to a method and device for generating coordinates of a moving position, in particular to a method and a device for generating coordinates of a moving position applied to a man-machine interface input control device.

Background technique

Touch panels and touch display panels are human-machine interface input devices widely used in today's electronic products. Users can use a stylus or fingers to slide and touch on the surface of the touch panel or touch display panel to achieve The purpose of controlling command input into electronic products. By controlling the circuit to regularly sample the pressed positions of the touch panel and the touch display panel, the movement track of the user's stylus or finger can be detected. In order to trim the unsmooth movement trajectory of the actual jitter into a nearly smooth curve, the existing control circuits usually use a fixed number of smooth buffers (smooth buffer) to store the pressed position coordinates obtained by sequential sampling, and When the smooth buffer (smooth buffer) is filled, all the position coordinates stored in the smooth buffer are averaged to obtain a moving position coordinate of the position coordinates, thereby improving the linearity of the moving track. However, the moving speed of the user's stylus or finger varies from fast to slow, resulting in inconsistent effects of improving the linearity of the moving track.

Contents of the invention

The invention discloses a method for generating moving position coordinates, which is applied to a man-machine interface input control device. The man-machine interface input control device continuously generates a plurality of position coordinates according to the movement of an object. The device includes a storage unit and an operation unit. The method includes the following steps: reading and storing the position coordinates; when the number of the stored position coordinates reaches a preset value, calculating the position coordinates to obtain the moving position coordinates; The change of the speed changes the size of the preset value.

The operation is to perform an average value operation on the position coordinates to obtain the moving position coordinates.

The operation is to perform a weighted average operation on the position coordinates to obtain the moving position coordinates.

The operation is to perform an intermediate value operation on the position coordinates to obtain the moving position coordinates.

The step of changing the predetermined value according to the change of the moving speed of the object includes decreasing the predetermined value according to the increase of the moving speed of the object.

The step of changing the predetermined value according to the change of the moving speed of the object includes increasing the predetermined value according to the decrease of the moving speed of the object.

The step of changing the preset value according to the change of the moving speed of the object includes:

Calculate a plurality of coordinate difference values respectively according to two adjacent position coordinates in the position coordinates;

The sum of the coordinate differences represents the moving distance of the object;

reducing the preset value when the moving distance of the object is greater than a maximum distance threshold of the preset value; and

When the moving distance of the object is less than a minimum distance threshold of the preset value, the preset value is increased.

Description of drawings

FIG. 1 is a schematic flowchart of a method for generating coordinates with a moving position proposed by the present invention.

FIG. 2 is a functional block diagram of a touch device with a moving position coordinate generating device proposed by the present invention.

3A-3B are diagrams showing the state change of the position coordinate quantity of the touch point according to the present invention.

Among them, reference signs:

Man-machine interface input control device 21

Mobile position coordinate generating device 20

storage unit 201

Arithmetic unit 202

External device 22

Detailed ways

Please refer to FIG. 1 , a schematic flow chart of the method for generating the moving position coordinates proposed by the present invention. First, the man-machine interface input control device continuously generates position coordinates of multiple touch points according to the touch and movement of an object (step 11) , taking the touchpad controller as an example, it can continuously generate the position coordinates of multiple touch points according to the movement of the user's finger or stylus on the touchpad. Since the sampling speed is usually consistent, the The number of position coordinates generated in the same length of time is the same. Next, as shown in step 12, the position coordinates of the touch point are read and stored, for example, a storage unit can be used to store the position coordinates. Then step 13 is used to judge whether the number of the position coordinates of the touch point stored in the storage unit reaches the preset value, and when the number reaches the preset value, step 14 is performed to convert the position of the touch point The coordinates are computed to obtain the mobile position coordinates representing the position coordinates.

As for the above-mentioned operation to obtain the moving position coordinates representing the position coordinates of the touch point, the position coordinates can be weighted and averaged to obtain the moving position coordinates, that is, it can be a newly generated touch point. The position coordinates have a higher weight, and of course the newly generated touch point position coordinates have a lower weight. Alternatively, the moving position coordinates can also be obtained by using an average value operation in which the weights of the position coordinates of the touch points are the same, and even an intermediate value in the position coordinates can be used to complete the calculation.

In addition, in order to improve the problem of inconsistencies in the trajectory linearity effect of the touch device caused by the speed change of the user's stylus or finger movement, in step 15, the preset is changed according to the change of the moving speed of the object. The size of the value. The larger the preset value, the better the linearity of the detected movement trajectory, but the farther it will be from the actual touch path, and the smaller the preset value, the poorer the linearity of the detected movement trajectory, but it will be closer to the actual touch path Touch the path. Therefore, under the condition of the same preset value, and because the sampling speed is consistent, the number of touch point position coordinates generated in the same length of time is the same, so when the stylus or finger moves the line at a slower speed , only move a short distance in the same time to make the number of stored coordinates of the touch point reach the preset value and calculate a moving position coordinates. On the contrary, when the stylus or finger moves faster , it needs to move a long distance in the same time to make the number of stored touch point position coordinates reach a preset value and calculate a moving position coordinate. And too long or too short moving distance may bring adverse effects. Therefore, in step 15, the size of the preset value can be changed according to the change of the moving speed of the object, and then the oldest touch point position coordinates among the touch point position coordinates stored in the storage unit are cleared (Step 16) Return to step 12 to store the newly read coordinates of the touch point position.

The estimation of the moving speed of the object is calculated using the following method: first, according to the coordinates of the coordinates of the coordinates of the coordinates of the coordinates of the coordinates of the coordinates of the preset values stored in the storage unit, the coordinates of the coordinates of the coordinates of the coordinates of the coordinates of the adjacent touch points are calculated respectively. coordinate difference to obtain the distance between two adjacent touch points; and sum the distances to obtain the moving distance of the object. When the sampling speed of the controller is consistent, the moving distance in the same length of time can be regarded as the moving speed. When the moving distance is longer, the moving speed is faster. Conversely, when the moving distance is shorter, the moving speed is slower.

The above-mentioned step 15 can be completed in the following manner, for example, the preset value can be decreased according to the increase of the moving speed of the object, or the preset value can be increased according to the decrease of the moving speed of the object. Both judgments can be made. The purpose is to control the distance required to reach the preset value within an appropriate range, so as to avoid adverse effects that may be caused by too long or too short moving distance. For example, as shown in FIG. 3A , the sample coordinate state change diagram of the moving speed of the object from slow to fast, the preset value can be set to 6 at the time of system initialization and there are multiple speed ranges belonging to different preset values. With the maximum distance threshold value, the preset value can be set manually or automatically according to different speed ranges and desired sensitivities. As shown in the figure, the positions of the 6 touch points obtained after 6 sampling Coordinates (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), (X5, Y5), (X6, Y6) are recorded in the storage unit to represent the touch point The calculation of the moving position coordinates of the position coordinates, and when the sum of the distances of the further calculated six touch points is greater than the preset maximum distance threshold value, it means that the moving speed of the object is too fast, and the preset value for the next detection can be lowered Set to 5 to avoid coordinate calculation errors caused by too long moving distance. In the next detection, the system will obtain 5 touch point position coordinates (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), (X4, Y4), ( After X5, Y5), the calculation will be performed. By analogy, if the sum of the moving distance of the object is increased to be greater than the maximum distance threshold value belonging to the preset value of 5, it means that the moving speed of the object is too fast, then the preset value is further reduced to 4, and then down In one detection, only 4 samples are taken to obtain the 4 touch point position coordinates (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), and then the calculation is performed.

On the contrary, as shown in Figure 3B, the sample coordinate state change diagram of the moving speed of the object from fast to slow, the preset value can be set to 6 at the time of system initialization and the minimum distance threshold value is set, and it is obtained after 6 samples The six touch point position coordinates (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), (X5, Y5), (X6, Y6) are recorded in the storage unit. A calculation is performed on moving position coordinates representing the touch point position coordinates. And when the sum of the distances of the six touch points is less than the preset minimum distance threshold, it means that the object is moving too slowly, and the number of preset values in the storage unit per unit time is not enough to record the coordinates, so the preset value is increased for 7. In the next detection, the system will obtain 7 touch point position coordinates (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), (X4, Y4), ( X5, Y5), (X6, Y6), (X7, Y7) before the operation. By analogy, if the total moving distance of the object is less than the minimum distance threshold of the preset value of 7, the preset value will be increased to 8, and the 8 touches obtained by sampling 8 times in the next detection Point position coordinates (X1, Y1), (X2, Y2), (X3, Y3), (X4, Y4), (X5, Y5), (X6, Y6), (X7, Y7), (X8, Y8) operation afterward.

Please refer to FIG. 2 again, which is a schematic functional block diagram of a touch device with a moving position coordinate generating device proposed by the present invention. The touch device disclosed in the present invention includes a moving position coordinate generating device 20, a man-machine interface input control device 21 and an external device twenty two. The mobile position coordinate generating device 20 can be applied to the human-machine interface input control device 21, wherein the human-machine interface input control device 21 continuously generates a plurality of touch point position coordinates according to the movement of the object (not shown), and the mobile position The coordinate generating device 20 includes a storage unit 201 and a computing unit 202, wherein the storage unit 201 is used to store the coordinates of the touch point position generated by the moving position coordinate generating device 20, and the signal is connected to the computing of the storage unit 201 Unit 202, when the number of the touch point position coordinates stored in the storage unit 201 reaches a preset value, calculate the touch point position coordinates to obtain a moving position coordinate, and can according to The change of the position coordinates of the touch point is used to estimate the moving speed of the object, and then the preset value is changed according to the change of the moving speed of the object. The coordinates of the moving position can be output to the external device 22 or similar data system devices to control the pointer objects such as cursors and brushes of the external device 22. The external device can be, for example, a touch panel or a touch display. devices, mobile displays, interactive displays, and more.

Taking the man-machine interface input control device 21 completed by the touch panel controller as an example, multiple touch point position coordinates can be continuously generated according to the movement of the user's finger or stylus on the touch panel. Since the sampling rate is usually is consistent, so the number of position coordinates generated in the same length of time is the same. Therefore, the calculation unit 202 will judge whether the number of the touch point position coordinates stored in the storage unit 201 reaches a preset value, and when the number reaches the preset value, the touch point position coordinates will be calculated and A moving position coordinate representing the position coordinate of the touch point is obtained.

As for the various actions performed by the computing unit 202, such as the judgment and calculation of whether the quantity reaches the preset value, and the details of changing the size of the preset value according to the change of the moving speed of the object, they are respectively related to the above-mentioned steps 13 and 14. The related content of step 15 is the same, so it will not be repeated. The above-mentioned method can also be directly used to estimate the moving rate of the object according to the change of the position coordinates, and calculate a plurality of coordinate differences according to the position coordinates of two adjacent touch points in the position coordinates to obtain distances between two adjacent touch points, and then sum the distances to obtain the moving distance of the object. And when the sampling rate of the controller remains consistent, the moving distance in the same time length can be regarded as the moving rate.

In addition, the above-mentioned software method and hardware device can also be implemented by firmware, such as using an adjustable-length array buffer to complete the above-mentioned storage unit 201. In this way, changing the default value can be achieved by changing the array buffer The length of the array is completed, and the operation is performed as soon as the array is full.

In summary, the technical means of the present invention can be widely applied to various human-machine interface input devices, such as common touch panels, touch displays, trackballs or mice, etc. , can effectively improve the lack of common means. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of protection of the invention shall be determined by the claims.

Claims (7)

1. A mobile position coordinate generation method, applied on a man-machine interface input control device, is characterized in that, the method comprises the following steps: Detect the movement of an object and continuously generate multiple position coordinates; read and store the location coordinates; When the number of stored position coordinates reaches a preset value, performing an operation on the position coordinates to obtain a moving position coordinate; and The size of the preset value is changed according to the change of the moving speed of the object. 2 . The method for generating the moving position coordinates according to claim 1 , wherein the operation is to perform an average value operation on the position coordinates to obtain the moving position coordinates. 3 . 3 . The method for generating the moving position coordinates according to claim 1 , wherein the operation is to perform a weighted mean calculation on the position coordinates to obtain the moving position coordinates. 4 . 4 . The method for generating the coordinates of the moving position according to claim 1 , wherein the operation is to perform an intermediate value operation on the coordinates of the position to obtain the coordinates of the moving position. 5 . 5. The method for generating mobile position coordinates according to claim 1, wherein the step of changing the preset value according to the change of the moving speed of the object includes changing the value according to the increase of the moving speed of the object The preset value is decreased. 6. The method for generating mobile position coordinates according to claim 1, wherein the step of changing the preset value according to the change of the moving speed of the object includes changing the preset value according to the decrease of the moving speed of the object The preset value is increased. 7. The method for generating mobile position coordinates according to claim 1, wherein the step of changing the preset value according to the change of the moving speed of the object comprises: Calculate a plurality of coordinate difference values respectively according to two adjacent position coordinates in the position coordinates; The sum of the coordinate differences represents the moving distance of the object; reducing the preset value when the moving distance of the object is greater than a maximum distance threshold of the preset value; and When the moving distance of the object is less than a minimum distance threshold of the preset value, the preset value is increased.

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